Sober or drunk, historians must look at the evidence | Letters

In the same way that claiming that the moon is made of green cheese does not make one a physicist of an unusual sort, so Holocaust deniers can be as sober or as drunk as they like, but they will never be historians (History is not just for sober academics, 24 February). Historians debate how and why past events happened and how we should understand their meaning in the present. They too can do this either sober or drunk, but what they do not do in either condition is waste time claiming that eve